Bug Spray on Boat Plastics

Looking for some help and figured someone here may have experience with this. Apparently bug spray and boat plastics do not mix. We had family visit the cabin and my cousin sprayed a bunch of bug spray in the boat resulting in white dots accumulating on the fish locator, throttle, and steering wheel in the boat. They do not wipe away and I am at a loss as to how to restore the plastic back to normal. Does anyone have any experience with this? What's the best route to fixing it? Thanks